Ordered the 5oz cheese burger combo with fries and a chocolate shake. The flavour of the burger was very good, the fries are run of the mill nothing special, the milkshake was good and creamy. The price is pretty good but for a whole family of four the price does get up there. The atmosphere is very nice, and was quiet busy for the late afternoon lunch.
Overall, I would say if your in the area and hungry it's a good place to eat, but I wouldn't make any special trips to Retro Burger.